Masonry silo



H. F. STEINKRAUS.

MAsoNRY srLQ. APPLICATION FILED FEB. H. 1918.

1,388,166. Patented June 28, 1921.

2 SHEETS-SHEET l.

Mii/zam@- 2H.. Y.' SEIVNKRAUS., MASONRY SILO. APPLIQATION FILED FEB. l1.|918.

" 1,383,166. PatentedJune'zs, 1921.

2 SHEETS-SHEET 2. y

,UNITED STATES PATENT oFFicE.

HENRY Il'. STEINKRAUS, OF BERTI-IA, MINNESOTA, ASSIGNOR OF ONE-THIRD TOWILLIAM P. CHASE, OF BAKER, MINNESOTA.

MASONRY SIIiO.

Specification of Letters Patent. Patented June 28, 192LV Application ledFebruary 11, 1918. Serial No. 216,474..`

Y such as will enable others vskilled in the art Vsilo shown in Fig. l,but Von a reduced scale;

thel novel devices and combinations of de-V vices hereinafter describedand definedfin the claims.V i

My invention is illustrated inthe accompanying drawings, wherein likenotations refer to like partsthroughout theV several views. Y v

In said drawings, Y. Figure l, is a perspective view illustrating a siloembodying my invention;

F ig. 2 is a horizontal cross section of the Fig. 3 isa `detail' showingsome of the samev parts appearing in Fig. 2, but on a larger scale; n

Figs. l and 5 are perspective views of one of the masonry slabs, of thekind` shown in Figs. l, 2 and 3, detached, and Fig. ibeing an insideview `and Fig. 5 being an outside View, with reference to the positionsthey occupy, when assembled in the silo wall.

Fig. 6 is a further detail showing some o f theJ same parts appearing inFig. 3, `but on a still larger scale and as they would appear beforevthe hoops werev drawnA together, at their opcn'ends, into their finalposition; and

F ig. 7 is a viewV similar to Fig. 3, but illustrating aslightlyymodified form of the maf slabs 9; the numeral l0 representsthesplit oropenended drawrhoops provided with the customary draw bolt ll,`seated in; the A flanged en ClS of the hoop and adapted 'QQ .plied inFig. l.

draw. the same together, when in proper working position. The numeral l2Vrepresents a roof of any suitable structure, applied in any suitable orcustomary way to cover and close the top of the silo. Of course, inpractice, the silo is also provided with suitable doors, not here shown.

The masonry slabs `9 are preferably composed of concrete, but may bemade of the same material as brick or tiling; and I prefer to mold thesame, so that they will have curved inner and outer faces, asillustrated in all the views, except Fig. 7; for the reason that I c authereby lget a silo wall formed on a true circle, or substantially truecircle,

arcs of the inner faces of the slabs,`as shown in the drawings.- (Figs.l, 2, 3 and 6.) I

may, however, make `the said` masonry slabs with Vparallel straightinner and outer faces, and then set the same, relative to each other, onthe chords of comparatively short arcs, so as to thereby get apolyhedral wall, which is approximately circular, as illustrated in Fig.7, the slabs there shown being marked with the reference 1 The masonryslabs 9 are all rabbeted on both their outer and their inner lverticalad joining edges toV afford lseatsffa for packing means, which packingmeans is preferably in the form `ofstrips of wood, or other slightlycompressible `heat insulating material 13, of. rectangular form in crosssection,

-ing horizontal` edges, to afford seats b for similar packing material14, as shown ap.-

The seating edgesfof the slabs 49 land 9g. are straight in crosssection, at the upper and .lower ends of the slabs, but their verticalseating edges are convex, at one side, and con cave at the other, the`convexv or tenon surface being marked with the reference letter candthe concave surface or groovewithy the reference letter d inthe detachedviews, ,Figsid and 5.

Y Of course, the concave surface or. groove d of `one slab. is adaptedto receive the convex surface or tenen c of the adjacent, slab. Thesedetails may be varied. at will. n f

. Havingregard to the relative positionsofi the slabs in the respectivecourses, if prefer toemploy slabs of unequal ylengthrfor the.

starting courses and have enough .different lengths, so that I canposition the slabs of the successive courses, so that they will breakVare all of equal section measuredin the U Yplane of an arc Vof thesilo, or on the radiufS thereof, and are so set that't'heir verticalLrabf` beted surfaces aline with eachother, solas thereby to: affordcontinuous seats a Vfor the packing stripsl 13. rllhe packingfstrips 13may, therefore, be of alength equal to the height of the silo, or theymay beV made of shorter lengths and placed, one above the other to fillthe seats'and pack ythe 'joints toV Vthe full height of the silo.A Theslabs may,

Y ofcourse, be set in cement in Vthe customary way, and, after thegpackin'g*stripsl 13 have been placed in their seats, the'draw hoops 10l are applied and will,.lof course, embrace the outer surfacesV ofthefslabs and lthe outer faces ofthe 'outerY Vpacking strips. "Then whenthe draw bolts l1 `are"manipulated so faste tightenthe hoops, thewallswill be slightly'` contracted in the arc of the circle and this willlhave the effect of making `the vertical walls Vofthe inner seats a.pinch the vertical faces A' of the `strips 1'3 seated therein,` and thussecure the said stripsin their, desired working position. This slight'change in n the positionhof 'the slabs can be 'readilyunderstood by acomparison of the parts/shown in Fig.. 6 with the parts shown "inFigsQSor 7. In Fig. 'the partsy are shown as "they would appear, before'theends Vof the drawhoop have been drawn tightly together, whereas," inFigs. 3 7, the parts are shown as they Vwould, appearfafter the hoop hasbeenltightened up. 1 1

Injrespect tothe horizontal ypackin strips 14, shownV inV workingposition1 infig'. Al, theyare Vapplied to the seatsqn? afforded by therabbeted surfaces on the outside faces of are placedV in position tobuild up the wall and reliance is placed upon theweightofthe slabs, `orthe thin coating of cement atfthe* slab joints to. hold the horizontalstripslli in their working positions. Whenwood is eni-V ployed as thematerial'for the packingstrips 13 and l14, and they are intended. toVremain 5 A.' masonry silo, A'constructed as `'above described,`hascertain obvious advantages. It

Vis well `known that where masonry silos are j used inV sections of thecountry subject to eX- crete `foundation is' liable to heave and settle,under the action of the frost and the thawout, and if .the .concreteblocks of the. Ysilo walls'ar'e united solely by cementitious materials,the'change in the foundation, or the heaving and the settling of thewalls will crack the cementitious materials and open the joints `betweenthe blocks, or sometimes l even lcrack the blocks themselves. Byconstructing the slabs withthe rabbeted seats for great ythe change intemperatures from points above to points `below zero. Otherwise stated,if` there is'any heaving or settling of the foundationupon vwhich thesilo vwall is set, or expansion or contraction ofthe Vwalls themselves,due to change of temperature, there will be no opening ofv the joints,as the slabs may move relative to eachother and relatively to thepacking strips, while, nevertheless, keeping the packing strips `in such:position that the packedair-tight.

The foregoing is vespecially(advantageous 'whena silo ;is iirstbuilt incountriessubject to such change of 'temperature'.KV j

joints will be kept "Whenrthe wooden packing strips areemployed, it is,of course, obvious that thisisilo has the further importantl advantageofbe- 'ingpractically' portable; or, in other words,

the same can be readily knockedv down and v- What I `claim is 1. The.combination withmasonry slabs disposed to, afforda I substantiallycylindrical rmovedflfrom one place to another, whenever lso desired.'This 1s a .feature of importance 'to renters of farmswho ofttimes areobhged wall structure, said slabsbein'g rabb'e'ted VonV botli theirouterand inner vertical adjoining i H j j l edgesy and `onthefhorizon'taledges, outer Ithe slabs, atrthe ends thereof, as the slabs andinnerwooden joint strips interposed, re-

the wall structure," and serving,"when contracted, to draw .said slabsinto closer associationfand simultaneouslyv to compress said outer andinner joint strips andwooden joint stripsfinterposed in thehorizontalrab- 'Y bets on the outside of the slabs'and vheld in place bythe weight of said slabs.

Q ]The 'combination with masonry slabs disposed to afford asubstantially cylindrical wall structure, said slabs being rabbeted onboth their 'outer and inner vertical adjoining edges, and outer andinner wooden joint strips interposed,respectively, in the outer 1nd,inner rabbets Mld.' @Qtr-mtime @Xie/mel hoops applied around the Wallstructure, und serving, when contracted, to draw said slabs into closerassociation und simultaneously to compress Suid outer and inner jointstrips.y said slabs, between said outer und inner joint Strips havingcooperating concave and convex abutting surfaces limiting thecircumferential approach of said slabs but permitting the saine toadjust themselves angulurly to said joint strips.

In testimony whereof I affix my signature in presence of two Witnesses.

HENRY F. STEINKRAUS. Titnesses E. 'I`IioMrSoN,` ALICE E. STEINKRAUS.

